Written by Acorn Sales Company, manufacturing stamps and seals since 1964 · Reviewed by Holly R, VP of Sales and Marketing at Acorn Sales, against the Louisiana State Board of Examiners of Interior Designers and La. R.S. 37:3179.2, as stated in the Louisiana State Board of Examiners of Interior Designers Stamp and Registration guidance on 21 September 2026 · Updated 21 September 2026
Your seal goes on all drawings, renderings or specifications, and it is no smaller than one and one-half inches in diameter. The Board’s Stamp and Registration guidance cites LA RS 37:3179.2 and states that “All drawings, renderings, or specifications prepared by the holder of an interior design certificate or under their supervision shall be imprinted with their seal,” and it sets the size as a floor rather than a range: “The diameter of the seal must be no smaller than one and one-half (1.5) inches.” No maximum is published. Note the inclusion of renderings, which most states leave out of a sealing rule.
That breadth follows from what Louisiana is. The Board records that the state passed a Title Act in 1984 and that “The statute was updated to a Practice Act and passed in 1999,” which is why the sealing duty reaches work product rather than merely protecting a title. In a title state the device identifies a credential; here it authenticates the document.
The design is a substitution exercise rather than a specification to interpret. The Board publishes a sample and states that “The design of the seal must be the same as the design of the sample seal provided above except the name of the registrant and the registrant’s registration number must be substituted for the name and registration number shown.” Two fields change and nothing else does, so ask the Board for its sample before you order.
Louisiana interior designer seal requirements at a glance
| Requirement | Louisiana rule | Source |
|---|---|---|
| Seal required | Yes | La. R.S. 37:3179.2, as stated in the Louisiana State Board of Examiners of Interior Designers Stamp and Registration guidance |
| Required elements | Your name as registrant, substituted for the name on the Board sample; Your registration number, substituted for the number on the Board sample; The remaining design exactly as the Board sample shows it | Louisiana State Board of Examiners of Interior Designers, Stamp and Registration guidance |
| Size and shape | No smaller than one and one-half inches in diameter. | Louisiana State Board of Examiners of Interior Designers, Stamp and Registration guidance |
| Device allowed | Three formats, subject to one performance test: “The seal can be either rubber stamp, impression seal, or electronic as long as it will produce a clearly visible and legible image of the seal when copied or reproduced.” That last clause is the operative one and it effectively rules out an impression seal used on its own for anything that will be photocopied or scanned. | Louisiana State Board of Examiners of Interior Designers, Stamp and Registration guidance |
| Signature and date | Not addressed in the Board’s published seal guidance. | Louisiana State Board of Examiners of Interior Designers, Stamp and Registration guidance (silent as to signature and date) |
| What must be sealed | All drawings, renderings or specifications prepared by the holder of an interior design certificate or under the holder’s supervision. | La. R.S. 37:3179.2, as stated in the Board’s Stamp and Registration guidance |
| Electronic seal | Louisiana permits an electronic seal for interior designers and states a performance test rather than a technology: the seal, in whichever of the three formats, must “produce a clearly visible and legible image of the seal when copied or reproduced.” No certificate authority, cryptographic standard, verification service or stripping language is published in the Board’s seal guidance. | Louisiana State Board of Examiners of Interior Designers, Stamp and Registration guidance |
| Renewal and lapse | Not addressed in the Board’s published seal guidance. | Louisiana State Board of Examiners of Interior Designers, Laws and Regulations page |
| Firm requirements | Not addressed in the Board’s published seal guidance. | Louisiana State Board of Examiners of Interior Designers, Stamp and Registration guidance (no firm provision) |
| Regulator | The Louisiana State Board of Examiners of Interior Designers | Louisiana State Board of Examiners of Interior Designers, Stamp and Registration guidance page and Laws and Regulations page, read in full from the Board’s own site |
Is a seal required in Louisiana?
Louisiana is a practice act state for interior design and the seal obligation is unqualified. The Board’s published Stamp and Registration guidance states the rule and its source: it cites LA RS 37:3179.2 and then states that “All drawings, renderings, or specifications prepared by the holder of an interior design certificate or under their supervision shall be imprinted with their seal.” The Board also records that Louisiana passed a Title Act in 1984 and that “The statute was updated to a Practice Act and passed in 1999,” which is why the sealing duty reaches work product rather than merely protecting a title.
What must appear on the seal
- Your name as registrant, substituted for the name on the Board sample
- Your registration number, substituted for the number on the Board sample
- The remaining design exactly as the Board sample shows it
The Board’s guidance is unusually strict about substitution and nothing else: “The design of the seal must be the same as the design of the sample seal provided above except the name of the registrant and the registrant’s registration number must be substituted for the name and registration number shown.” Two fields change and nothing else does. Separately, the Board controls how the credential appears on printed material: a registrant’s printed material should carry the name together with either the short form giving the Louisiana registration identifier or the long form naming the registrant as a Louisiana Registered Interior Designer with the number, and “No other abbreviations of either are acceptable.”
Size and shape
No smaller than one and one-half inches in diameter. The Board’s guidance states a floor rather than a fixed figure or a range: “The diameter of the seal must be no smaller than one and one-half (1.5) inches.” No maximum is published. That is a different specification from the Louisiana architect seal at approximately 1 3/4 inches under LAC 46:I § 1303.B, from the Louisiana engineer and land surveyor pair of 1 5/8 and 2 inches under LAC 46:LXI § 2701.A.2, and from the Louisiana landscape architect figure of 1 5/8 inches under LAC 7:XXIX § 117.B.3.a.
Embosser, rubber stamp or digital
Three formats, subject to one performance test: “The seal can be either rubber stamp, impression seal, or electronic as long as it will produce a clearly visible and legible image of the seal when copied or reproduced.” That last clause is the operative one and it effectively rules out an impression seal used on its own for anything that will be photocopied or scanned. The safe buy is a rubber stamp of at least 1.5 inches built to the Board sample, with a matching electronic image for drawing sets.
Signing and dating
Not addressed in the Board’s published seal guidance. The guidance requires the seal to be imprinted on all drawings, renderings and specifications and states no signature requirement, no date requirement and no placement rule. The sources here are the Board’s Stamp and Registration page in full and its Laws and Regulations page. Because Louisiana’s other design professions differ sharply on this point, engineers and land surveyors requiring signature and date under LAC 46:LXI § 2701, landscape architects requiring the seal over the signature under LAC 7:XXIX § 117.B.3.c, and architects requiring neither under LAC 46:I ch. 13, take the signature and date rule for interior designers from the current text of LAC 46:XLIII and R.S. 37:3179.2 rather than by analogy.
Louisiana is a practice act state, and renderings are sealed too
The Board states its own history plainly: Louisiana passed an interior design Title Act in 1984 and replaced it with a Practice Act in 1999. That single fact changes what the seal is for. In a title state the device identifies a credential; in Louisiana it authenticates work product, and the duty reaches “All drawings, renderings, or specifications” prepared by the certificate holder or under supervision. Renderings are rarely named in other states’ sealing rules.
Which documents must be sealed
All drawings, renderings or specifications prepared by the holder of an interior design certificate or under the holder’s supervision. Note the inclusion of renderings, which many states leave out, and note that there is no preliminary or draft carve-out in the Board’s published seal guidance. Because Louisiana is a practice act state for interior design, the sealed work product is what the registration protects, not merely the title.
Electronic and digital seals
Louisiana permits an electronic seal for interior designers and states a performance test rather than a technology: the seal, in whichever of the three formats, must “produce a clearly visible and legible image of the seal when copied or reproduced.” No certificate authority, cryptographic standard, verification service or stripping language is published in the Board’s seal guidance. The sources here are the Board’s Stamp and Registration page in full. Take any further electronic requirement from the current text of the Board’s rules at LAC 46:XLIII.
Renewal, lapse and retirement
Not addressed in the Board’s published seal guidance. The Stamp and Registration page does not say what happens to the device on expiration, suspension or revocation, whether the registration number changes on reinstatement, or whether the seal must be surrendered. The sources here are the Board’s Stamp and Registration page and its Laws and Regulations page, which point to the interior design statute and to the Board’s rules at LAC 46:XLIII as amended to November 2025. Because the registration number is one of only two fields you substitute onto the Board sample, a change of number would require a new device.
Firm requirements
Not addressed in the Board’s published seal guidance. The seal is described as the registrant’s, with the registrant’s name and registration number substituted onto the Board sample, and no firm name, firm number or firm seal appears in the guidance. The sources here are the Board’s Stamp and Registration page in full. Take any firm registration requirement from LAC 46:XLIII and the interior design statute rather than by analogy to the Louisiana architect certificates of authority at LAC 46:I ch. 17.
What to check before you order
Ask the Board for its sample seal and reproduce it exactly, substituting only your name and your registration number for the ones shown. Build the device no smaller than one and one-half inches in diameter; the Board publishes a minimum and no maximum. A rubber stamp, an impression seal or an electronic seal are all acceptable, provided the device produces a clearly visible and legible image when the document is copied or reproduced, which in practice means an impression seal alone is a poor choice for anything that will be scanned. Imprint the seal on all drawings, renderings and specifications you prepare or supervise. On printed material, use your name with either the short Louisiana registration identifier or the full Louisiana Registered Interior Designer wording with your number, and no other abbreviation.
Browse interior designer stamps and seals.
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Frequently asked questions
Is a seal required for a Louisiana registered interior designer?
Yes, and the obligation is unqualified. All drawings, renderings or specifications prepared by the holder of an interior design certificate or under the holder’s supervision must be imprinted with the seal, per LA RS 37:3179.2 as the Board states it in its Stamp and Registration guidance.
What goes on a Louisiana interior designer seal?
The Board’s sample design, with exactly two substitutions: your name as registrant and your registration number replace the name and number shown on the sample. Nothing else about the design changes, which is why the sample rather than a description is the thing to order from.
What size is the Louisiana interior designer seal?
No smaller than one and one-half inches in diameter, with no published maximum. That differs from the Louisiana architect seal at approximately 1-3/4 inches under LAC 46:I § 1303.B, from the engineer and land surveyor pair of 1-5/8 and 2 inches under LAC 46:LXI § 2701.A.2, and from the landscape architect figure of 1-5/8 inches under LAC 7:XXIX § 117.B.3.a, so nothing in the state transfers across.
Rubber stamp, impression seal or electronic in Louisiana?
All three, subject to one performance test: “The seal can be either rubber stamp, impression seal, or electronic as long as it will produce a clearly visible and legible image of the seal when copied or reproduced.” That clause effectively rules out an impression seal used on its own for anything that will be photocopied or scanned, so a rubber stamp of at least 1.5 inches built to the Board sample, plus a matching electronic image, is the practical set.
Does Louisiana require a signature and date with the seal?
The Board’s published seal guidance requires the seal to be imprinted and states no signature requirement, no date requirement and no placement rule. Because Louisiana’s other design professions differ sharply on this point, with engineers and land surveyors requiring signature and date under LAC 46:LXI § 2701, landscape architects requiring the seal over the signature under LAC 7:XXIX § 117.B.3.c and architects requiring neither under LAC 46:I ch. 13, take the interior designer rule from the current text of LAC 46:XLIII and R.S. 37:3179.2 rather than by analogy.
Do renderings really have to be sealed in Louisiana?
The Board’s statement of the duty names them: all drawings, renderings or specifications. Most states leave renderings out of a sealing rule entirely, so this is worth checking your own workflow against.
Is there a preliminary or draft exception in Louisiana?
The Board’s published seal guidance contains none. Many states carve out preliminary, schematic or design development material; this guidance does not, so treat the duty as reaching the document types it names without assuming a carve-out.
How do I write my Louisiana credential on printed material?
Two forms and no others. A registrant’s printed material should carry the name together with either the short form giving the Louisiana registration identifier or the long form naming the registrant as a Louisiana Registered Interior Designer with the number, and the Board states that “No other abbreviations of either are acceptable.” Invented abbreviations on a title block are a Board issue rather than a style choice.
Can I seal Louisiana documents electronically?
Yes. Louisiana permits an electronic seal and states a performance test rather than a technology: the seal must produce a clearly visible and legible image when copied or reproduced. No certificate authority, cryptographic standard, verification service or stripping language appears in the Board’s seal guidance, so take any further electronic requirement from the current text of the Board’s rules at LAC 46:XLIII.
What happens to my Louisiana seal if the registration changes?
The Board’s published seal guidance does not address expiration, suspension, revocation, surrender or whether the registration number changes on reinstatement. What follows from the design itself is worth knowing: the registration number is one of only two fields substituted onto the Board sample, so a change of number would mean a new device.
Is there a Louisiana interior design firm seal?
The Board’s seal guidance describes the device as the registrant’s, with the registrant’s name and registration number substituted onto the sample, and mentions no firm name, firm number or firm seal. Take any firm registration requirement from LAC 46:XLIII and the interior design statute rather than by analogy to the Louisiana architect certificates of authority at LAC 46:I ch. 17.
